WOOTON AND STANDLEY—FLORA OF NEW MEXICO. 503 
1. Dasystephana romanzovii (Ledeb.) Rydb. Bull. Torrey Club 33: 148. 1906. 
Gentiana romanzovii Ledeb.; Bunge, Nouv. Mém. Soc, Nat. Moscou 1: 215, pl. 11. 
f. 1. 1829. 
Gentiana frigida of authors, not Haenke, 1788. 
Type Locauiry: Gulf of St. Lawrence, Siberia. 
Rance: Alaska to Montana, Utah, and New Mexico; also in Siberia. 
New Mexico: Santa Fe and Las Vegas Mountains. High mountain meadows, 
in the Arctic-Alpine Zone. 
2. Dasystephana parryi (Engelm.) Rydb. Bull. Torrey Club 33: 149. 1906. 
Gentiana parryi Engelm. Trans. Acad. St. Louis 2: 218. pl. 10. 1863. 
Type Locauiry: ‘Near the base of Alpine slopes on the Snowy Range, Colorado.” 
Rance: Wyoming to Utah and New Mexico. 
New Mexico: Baldy; Taos Mountains; Costilla Pass; Santa Fe and Las Vegas 
mountains. Mountain meadows, in the Hudsonian and Arctic-Alpine zones. 
3. Dasystephana rusbyi (Greene) Woot. & Standl. Contr. U. 8. Nat. Herb. 16: 
159, 1913. 
Gentiana rusbyi Greene; A, Gray, Syn. Fl, 21: 406. 1878. 
Typr Locauity: Mogollon Mountains, New Mexico. Type collected by Rusby in 
1881. 
Rance: Known only from type locality. 
4. Dasystephana bigelovii (A. Gray) Rydb. Bull. Torrey Club 33: 149. 1906. 
Gentiana bigelovit A. Gray, Proc. Amer, Acad, 19: 87. 1883. 
Type LocaLity: Sandia Mountains, New Mexico. Type collected by Bigelow in 
1853. 
Range: Colorado and New Mexico, 
New Mexico: Sandia Mountains; Upper Pecos; Beulah; Lincoln National Forest; 
Castle Rock. Mountains, in the Transition Zone. 
5. Dasystephana interrupta (Greene) Rydb. Bull. Torrey Club 33: 149. 1906. 
Gentiana interrupta Greene, Pittonia 4: 182. 1900. 
Tyre LocaLiry: Meadows along streams at Pagosa Springs, southern Colorado. 
Ranae: Colorado to Nevada and New Mexico. 
New Mexico: Dulce; Upper Pecos; Chicorico Canyon; Sandia Mountains; Carrizo 
Mountains; West Fork of the Gila; White Mountains. Meadows in the mountains, 
in the Transition Zone. 
10. PLEUROGYNA Eschsch. 
Slender glabrous annual with linear leaves and whitish flowers in a narrow panicle; 
corolla rotate or campanulate, pentamerous; pedicels slender, erect; sepals linear, 
green; stamens inserted on the corolla tube near its base; style none, the stigmas decur- 
rent along the sutures of the ovary. 
1. Pleurogyna fontana A. Nels. Proc. Biol. Soc. Washington 17: 177. 1904. 
TYPE LOCALITY: Crow Creek, Colorado. 
Rance: Wyoming to northern New Mexico. 
New Mexico: Costilla Valley (Wooton). Bogs. 
Order 44. ASCLEPIADALES. 
KEY TO THE FAMILIES. 
Styles united; stamens distinct or gynandrous; 
pollen loosely granular ................--- 114, APOCYNACEAE (p. 504). 
Styles distinct; stamens monadelphous; pollen 
united into waxy masses, or the grains in 
groups of 4....2200... 220 0eec eens eee eeees 115, ASCLEPIADACEAE (p 506). 
